#include<stdio.h>

int main()
{
  //int retSan = 0;
  int retPri = 0;
  //char arr[20] = { 0 };
  //int tmp1 = 0;
  //int tmp2 = 0;
  //retSan = scanf("%d", &tmp1);
  //printf("%d\n", retSan);
  //retSan = scanf("%d %d", &tmp1, &tmp2);
  retPri = printf("%s", "hello world\n");
  printf("retPri:%d\n", retPri);
  return 0;
}
